OBD says PO420 cat bank 1----replaced it, engine light went OFF but still LOOOOW power on BIG hills. Do I replace another, all three? Drives good enough besides the hills. Car is in amazing shape otherwise. New coil packs.
2005 ford escape with 250K
Clarification: what did you replace? Also which engine?
THANKS! I replaced the left (front) bank 1 catalytic convertor. It also has new ECM and coil packs. It is the Ford 3.0 V6.
Many things can do that from clogged fuel filters to Wakefield pumps but realize if your cat went bad and broken pieces the pieces could be in your muffler and now the muffler is clogged up and it needs replacing so check the back pressure on the muffler first
will do THANKS!
Scott Young
I am replacing Throttle position sensor. Fits complaints.